/Engine/Plugins/Media/MediaCompositing/Source/MediaCompositingEditor/Public/Sequencer/MediaTrackEditor.h
Callback for AnimatablePropertyChanged in HandleAssetAdded for media sources.
[FKeyPropertyResult](API\Editor\Sequencer\FKeyPropertyResult) AddMediaSource ( [FFrameNumber](API\Runtime\Core\Misc\FFrameNumber) KeyTime, class [UMediaSource](API\Runtime\MediaAssets\UMediaSource) * MediaSource, int32 RowIndex )